import html2Canvas from 'html2canvas'
import jsPDF from 'jspdf'

export default {
  install(Vue, options) {
    Vue.prototype.getPdf = function () {
      console.log('this.htmlTitle', this.htmlTitle)
      var title = this.htmlTitle;
      document.getElementsByClassName('submit')[0].style.display = 'none';
      console.log('document.querySelector(\'#pdfDom\')', document.querySelector('#pdfDom'));
      html2Canvas(document.querySelector('#pdfDom'), {
        // allowTaint: true,
        useCORS: true,
        scale: 5
      }).then(function (canvas) {
        let contentWidth = canvas.width;
        let contentHeight = canvas.height;
        let pageHeight = contentWidth / 592.28 * 841.89
        let leftHeight = contentHeight
        let position = 20
        let imgWidth = 595.28
        let imgHeight = 592.28 / contentWidth * contentHeight
        let pageData = canvas.toDataURL('image/jpeg', 1.0)
        let PDF = new jsPDF('', 'pt', 'a4')
        if (leftHeight < pageHeight) {
          PDF.addImage(pageData, 'JPEG', 0, 20, imgWidth, imgHeight)
        } else {
          while (leftHeight > 0) {
            PDF.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
            leftHeight -= pageHeight
            position -= 841.89
            if (leftHeight > 0) {
              PDF.addPage()
            }
          }
        }
        PDF.save(title + '.pdf');
        document.getElementsByClassName('submit')[0].style.display = 'block';
      })
    }
  }
}
